How to download file amazon s3 bucket in C#?

// Get an amazon S3 client
    try
    {
        AmazonS3Config config = new AmazonS3Config();
        config.RegionEndpoint ="Your region" 
        m_s3Client = new AmazonS3Client("Your access key",
                                         "Your secret key",
                                          config);
         m_connected = true;
    }
    catch (Exception ex)
    {
        // Handle exception
        m_connected = false;
    }

/// Use it to get the file
    if (m_connected)
    try
    {
        GetObjectRequest request= 
        new GetObjectRequest
           { 
              BucketName = bucketName,
              Key = Key    // Key is of the form "folder/folder/filename"
                        // or if the file is directly in bucket just "filename" 
            };
        using (GetObjectResponse response = m_s3Client.GetObject(request))
        using (Stream responseStream = response.ResponseStream)
        using (StreamReader reader = new StreamReader(responseStream))
        {
            string contentType = response.Headers["Content-Type"];
            string responseBody = reader.ReadToEnd(); 
            // Now you process the response body.
            if (File.Exists(SelectedToDownload.FileName))
                File.Delete(SelectedToDownload.FileName);

             File.WriteAllText(SelectedToDownload.FileName, responseBody);
             string readText = File.ReadAllText(SelectedToDownload.FileName);
             
               
            }
        catch (AmazonS3Exception e)
        {
            // Handle Exceptions
        }